math/cmplx: added clarifying comment

Fixes #14890.

Change-Id: Ie790276b0e2ef94c92db3a777042d750269f876a
Reviewed-on: https://go-review.googlesource.com/20953
Reviewed-by: Alan Donovan <adonovan@google.com>

diff --git a/src/math/cmplx/cmath_test.go b/src/math/cmplx/cmath_test.go
index 6b3468402fb82893a53889a51ef1bea9801ac94c..d904be880d829ce0447cf96e6e5e2e7fe2e7a6f9 100644 (file)
--- a/src/math/cmplx/cmath_test.go
+++ b/src/math/cmplx/cmath_test.go
@@ -9,6 +9,9 @@ import (
        "testing"
 )
 
+// The higher-precision values in vc26 were used to derive the
+// input arguments vc (see also comment below). For reference
+// only (do not delete).
 var vc26 = []complex128{
        (4.97901192488367350108546816 + 7.73887247457810456552351752i),
        (7.73887247457810456552351752 - 0.27688005719200159404635997i),